Lock-washer



W. F. FARNSWORTH.

LOCK WASHER. APPLICATION FILEDv AIIGJB. 1919.

f PaIenIedAp. 6,1920.

WIS

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wILLIAivIl r.'rAaNswoaTH, or WASHINGTON, DISTRICT lor, COLUMBIA. Y

LOCK-WASHER.

Specification of Letters Patent.

Application tiled August 28, 1919. Serial No. 320,480.

To all whom imag concern: v I

Be it .known that l, l/VILLIAM F. FarmswoR'ri-i, a citizen of the United States, residingv at l'lashington, in the District of Columbia, haveinvented certain new and useful improvements in Lock-Vashers, of which the following is a specification.

rl`his invention relates to nut Vlocks and more particularly to a nut locking washer adapted for use in connection with rail joints. It is a primary object of the invention to provide a nut locking structure of the character indicated of the utmost sim* plicity and one capable of being manufactured at a very small cost.

ln the accompanying drawing in which like characters of reference designate corresponding parts throughout the several I views- Figure 1 is a fragmentary side elevation of a fish plate and the ends of abutting railsy Fig. 4 is a perspective view of aV lock i washer of the type illustrated in Figs. 1, 2

and 3;

Fig. 5 is an edge elevation of the lock washer illustrated in Fig. 4;

Fig. 6 is a detailed perspective view ofiv a modified form of nut locking structure; y

and

Fig. 7 is a perspective View of a further modification. f

In the drawing 5 and 6 designate the abutting ends of railroad rails and 7 and S the usual fish plate employed in conjunction therewith. rlhe securing bolts 9 are of usual construction, but the nuts 10 are provided with ratchet teeth 11 upon their inner faces.

The form of the invention illustrated in Figs.

1 to 5 includes a bolt embracing body portion 12 and divergent arms 13 and 14 carried thereby, which are of sufiicient length to extend to and engage with the under side of the ball portion of the rail whereby the lock washer is held against turning in either direction. The arm 13 prevents turningv of the washer during the time that the nut is being screwed up and they arm 14 prevents '12 Vand the arm.` 13b.

turning of lthe washer. under the tendency of the nut to unscrew, it being understood Eatented Apr. 6, 1920.

that at this time the ratchet .teeth 11`of thev nuts are 'engaged by pawly teeth 15 formed a at the junctureof the (body portionlZ-and the arm 13. To permit the necessary yielding movement of this tooth, thearm 18 and the body portion 12 are cut away'upon their rear faces as indicated at 16. The form of the invention illustrated in Fig. 7 is sub-l stantially the same as that illustrated in 4 1 Figs. 1 to 5 exceptfthat in Fig. 7 an eXten-V sion 14a is provided upon the arm 14, which constitutes an abutment to underlie thev ball' portion of the rail.

Fig. 6 arms 13b `and 14', correspondingto theL arms .13 and. 14 of Fig. y4, project from semi-circular halves 12a and 12b, which complementally constitute a. bolt embracingrporf y,

tion, a cut away portion 16a serves the func-V tion of the cut away portion 16 previously referred to and the same is true of a vpawl tooth 15aN formed at the `juncture of the half Divergent legs 1:7 carry outwardly directed feet 18 which are bent downwardly and inwardly and arev united by a transverse toe.19.1v The feet 18 extenddownwardly over the upper surfaces of the fish plate, and the toe 19 'engages beneathV the loweredgev of the fish plate,

byvirtue of which construction the'pwasher is rigidly `held against movement in any l rection.

I am well structure of a rail joint.' However, it is to aware of the factthat it has heretofore been proposed to# provide. lockY 'Y washers to'engag'V between the. rear faces Vof the nuts and portions of the fish plate of the Autmost simplicity and one capable'of -v great economy in manufacture. The several forms of the invention Vmay be made of bar' metal, bent to the proper shape 'andfthese may be `fashionedaty great speed with unskilled labor.

lt is vto be understood that 'the invention is not limited to the precise construction set forth but that it includes within its purview whatever changes fairly come within either terms or the spirit of the appended claims.

Having described my invention,` what I claim isv y 1. A device of the character described comprising a substantially circular bolt embracing body portion, upwardly extending divergent arms. carried by said body portion and a pawl tooth located at the juncture of said body portion and one of said arms.

2. A structure as recited n claim l wherein said arm and said body portion are cut e away at the rear to permit yielding movement of said tooth.

8. A device of the character described formed of a continuous piece of metal bent to form a bolt embracing body portion, upwardly extending divergent arms, downwardly extending divergent legs, outwardly extending feet carried by said legs, inturned portions carried by said feet adapted to en- 15 gage over the edge of the fish plate and a pawl tooth at the juncture of'said body portion and one of the upwardly extending arms.`

4;. A structure as recited in claim 3 in 20 wardly extending arms is cut away at a 25 point in the rear of said tooth.

In testimony whereof I affix my signature.

WILLIAM F. FARNSWORTH. 

